Shed-diverting means for looms



March 4, 1930.

A. E. BENSON 1,749,123,

SHED DIVERTING MEANS F0 R LOOMS Filed Aug. 28. 1928 2 Sheet-Shee. 1

- lnv enTo r. Aflhur E.Be.ns'on 1 [37M ATTy s.

March 4, 1930. A. E. BENSON 1,749,123

SHED DIVERTING MEANS FOR LOOMS Filed Aug. 28, 1928 2 Sheets-Sheet 2|nve.nTor Arthur E Benson I ATTys.

Patented Mar. 4, 1930 UNITED STATES PATENT OFFICE ARTHUR E. BENSON, OFBOSTON, MASSACHUSETTS, ASSIGNOR TO DRALPER CORPORA- TION, OF HOPEDALE,MASSACHUSETTS, A CORPORATION OF MAINE SHED-DIVE'B'TING MEANS FOR LOOKSApplication filed August as, 1928. Serial No. 802,486.

In the weaving of cloth, it is frequently desirable to control thetension on the warps so as to cover the filling to a greater extent onone face of the cloth than on the other, thus producing what iscommonly. known as cover on the cloth. If the warps forming one of theshed layers, as, for example, the lower shed layer, are given a greatertension than the remainder of the warps as the lay heats up, the desiredresult will be secured. Such a tension is frequently'secured to acertain extent by raising the whip roll and the sand roll, but this isnot always satisfactory and not always practical.

The object of the present invention is to rovide a definite means forthus placing cover on the cloth by diverting one of the shed layers fromits normal path each time the beat-up occurs so as to place a greatertension on the said shed layer than the remainder of the warps.

The object of the invention is further to provide such a mechanism inwhich a bar extends transversely of and adjacent to one of the shedlayers, preferably the lower shed layer, at the central portion of theshed, which bar is forced against the said shed layer to divert it fromits normal path as the beatup occurs.

The object of the invention is further to provide for the actuation ofthe shed diverting means from the actuating pitman of the usual layoperating means.

These and other objects and features of the invention will appear morefully from the accompanying description and drawings and will beparticularly pointed out in the claims.

In the drawings:

Fi 1 is a view chiefly in vertical cross sec tion looking toward theinside of the righthand side frame of an ordinary type of loom equippedwith a preferred form of the invention.

Fig. 2 is a similar view of a portion of the loom shown in Fig. 1 withthe parts in position as the lay starts from its rear position.

Fig. 3 is a View similar to Fig. 2 with the parts in the positionassumed at the conclusion of the beat-up.

Fig. 4 is a top plan view showing the construction of the partsparticularly concerned yvith the invention at the left-hand side of theoom.

The invention may be a lied to an t e of loom and is herein shov vii. asembodhefin an ordinary form of loom having three cam operated harnessframes. The loom is shown as comprising the usual'side frames 1 and 2,the breast beam 3, the lay 4 carrying the reed 5 supported on the swords6 pivoted on the rock shaft 7, the crank shaft 8 with the cranks 9 foroperating the lay through the medium of the pitmen 10, each pitman beingpivoted at one end to one of the cranks 9 and at the other end to thecorresponding lay sword, the warp beam 11 from which the warps lead overthe whip roll 12 through lease rods 13, thence through the harnessframes 14, 15 and 16. through the reed 5 to the breast beam 3. Theharness frames are shown as actuated by the usual levers 17 operated bycams 18-on the shaft 19.

All of these features of loom construction are well known and familiar,operate in the usual manner and afford a general representation of anordinary type of loom conveniently selected for an embodiment of thepreferred form of the invention. It will be seen that the operation ofthe harness frames in forming the shed divide the shed into what I havetermed an upper shed layer 20 and a lower shed layer 21. If, now, one ofthese shed layers, no matter of what individual warps it may consist asdetermined by the harness frames, continually be given a greater tensionthan the other as the beat-up occurs, the desired cover effect will beproduced in the woven fabric.

In the present invention, the result is secured by providing means fordiverting from its normal path one of these shed layers as thebeat-upoccurs. Preferably and conveniently the lower shed layer is thusdiverted.

, In the preferred embodiment, brackets 22 are bolted to the loom arch23 at each side.

The lower portions of these brackets project forwardly projecting,arallel, radial arms 25. A bar 26, preferab y of wood, having a smooth,upper, rounded surface is supported in the ends of the arms 25 and theparts areso located and pro ortioned that this bar extends transverse yof the loom adjacent to and just below the lower shed layer 21 at itscentral portion.

Operating arms 27 are also secured t5 the ends of the rock shaft 24 andproject radially and forwardly therefrom down a ongside the respectiveloom pitmen 10. These arms are provided with stop lugs 28 adapted toengage with the brackets 22 and limit the downward swinging movement ofthe rock shaft 24 with the bar 26 supported thereby. It Wlll be seenthat by raising the arms 27, the rock shaft to the respective pitmen andarranged to project beneath the arms 27. The arms 27 are so shaped'andthe studs 29 so located that as the lay beats up after the shuttle hasbeen icked, the bar 26 will be forced against the ower shed layer 21thus diverting it from its normal pat as shown in Fig. 3, and placing aheavy tension on the lower shed layer. As the lay swings back, the arms27 drop and the rock shaft 24 rotates in the reverse direction,withdrawing the bar 26 from engagement with the shed or into theposition shown in Fig. 2.

It will thus be seen that means are provided which extend transverselyof and adjacent one only of the shed layers and which act as the beat-upoccurs to divert this shed layer from its normal path thus to roduce there quired tension and secure the esired cover in the finished wovenfabric. Such a mechanism may readily be ap lied to existing looms and,in the preferred construction illustrated, contains no features that arelikely to get out of order or to interfere with the operation of theloom.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is:

1. A loom comprising a lay, lay operatin means comprising an actuatingpitman, she forming mechanism, a rock shaft extendin transversely of theloom and having aralle his is done in the construcgreater tension on thewarps forming said shed layer than upon the remainder thus to producecover in the woven fabric.

2. A loom comprising the construction ,de-

fined inclaim 1, in which the pitman has adjustably mounted thereon aprojecting stud for engaging and actuating the operating arm.

3. A loom com risin a la la 0 eratin means shed formihg me chani in, gro dk shaft extending transverselly of the loom and having armsvextending t erefrom, a bar carried by said arms extending transverselyof and adjacent to the shed layer occupying the same position at eachsuccessive beat-u an operating arm extending from said roc shaft engagedby said lay operating means as the beat-up occurs to rock the shaft andmove the bar to engage and divert said shed layer thereby to placegreater tension on the warps formingsaid shed layer than upon theremainder thus to produce cover in the woven fabric. P

In testimony whereof, I have signed my name to this specification.

ARTHUR E. BENSON.

radial supporting arms, a bar carried y said arms extendin transverselyof the central portion of the s ed, an operating arm extending radiallyfrom the roc shaft and engagin and actuated by the pitman to rock therec shaft and move the bar to engage and divert the adjacent shed layerthereby to place III

